From 1c1d6a17ef402f81ba8b579c7a737c84ed7f4380 Mon Sep 17 00:00:00 2001
From: Eryn Wells <eryn@erynwells.me>
Date: Sat, 30 Sep 2017 08:43:09 -0700
Subject: [PATCH] Basic validation for a board

---
 tictactoe.py | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/tictactoe.py b/tictactoe.py
index 0ea9fd9..708c9fc 100644
--- a/tictactoe.py
+++ b/tictactoe.py
@@ -1,7 +1,23 @@
-from flask import Flask
+from flask import Flask, abort, request
 
 app = Flask(__name__)
 
 @app.route('/')
 def hello():
-    return 'Hello!'
+    board = _get_board_or_abort()
+    return board
+
+def _get_board_or_abort():
+    '''
+    Get the board from the request, or abort the request with a 400 error.
+    '''
+    board = request.args.get('board', None)
+    is_valid = all(
+        board is not None,  # 'board' var must exist.
+        len(board) >= 9,    # Board should be at least 9 characters long.
+    )
+
+    if not is_valid:
+        abort(400)
+
+    return board